# AI Origin vs Zettelkasten

The clearest difference is in-app purchases: AI Origin at none against Zettelkasten's 2. AI Origin also leads on update cadence (every 4 days vs monthly) and device support (3 vs 1). Zettelkasten's advantage is ads (none vs shown). On price there is nothing between them.

Both are free to download. Zettelkasten sells 2 in-app purchases, starting at $9.99 per 7 days. AI Origin asks for nothing beyond the download.

AI Origin ships an update every 4 days, Zettelkasten monthly. The most recent releases landed on October 11, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | AI Origin | Zettelkasten |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Monthly |
| Size | 13 MB | 6 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Resilience (Mobile)](https://appshunter.io/developer/1790704078) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### AI Origin

[App page](https://appshunter.io/ios/app/ai-origin/id6757166849)

**Features:** macOS Compatibility

**In-app purchases:** none


### Zettelkasten

[App page](https://appshunter.io/ios/app/zettelkasten-notes-graph/id6771281468)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $9.99 | per 7 days |
| Yearly | $49.99 | per year |


## Frequently asked questions

### Is AI Origin free?

AI Origin is free to download, with no in-app purchases.

### Is Zettelkasten free?

Zettelkasten is free to download, with in-app purchases available.

### Do AI Origin or Zettelkasten have ads?

AI Origin shows ads; Zettelkasten does not.

### Which is updated more often, AI Origin or Zettelkasten?

AI Origin ships an update every 4 days, and Zettelkasten monthly. Most recently, AI Origin was updated on October 11, 2026 and Zettelkasten on October 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*